JESIEL DEMO.pptx
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This document discusses the differences between physical and chemical changes. A physical change involves a change in phase, size, or shape but does not create a new substance. Examples include crushing a can, boiling water, and chopping wood. A chemical change creates a new substance, as evidenced by formation of precipitate, production of heat or light, or change in color. Examples of chemical changes include burning wood, rusting iron, and digestion. The document provides objectives and examples to help distinguish between physical and chemical changes.
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JESIEL DEMO.pptx
- 2. OBJECTIV ES: Understand the difference between physical changes and chemical change. Tell evidence of physical changes and chemical change. Categorize changes as physical or chemical, and show examples of each.
- 3. WHAT IS PHYSICAL CHANGE?
- 4. PHYSICAL CHANGE No new substance is created. Involves a change in phase, size and shape. No alteration in its composition.
- 5. EXAMPLE CRUSHING A CAN BOILING WATER CHOPPING WOOD BREAKING OF GLASS
- 6. WHAT IS CHEMICAL CHANGE?
- 7. CHEMICAL CHANGE New substance is created. Evidence include formation of precipitate, production of heat and light and change in color
- 8. EXAMPLE BURNING OF WOOD RUSTING OF IRON DIGESTION
- 10. PHYSICAL CHANGE
- 11. PHYSICAL CHANGE
- 12. CHEMICAL CHANGE
- 13. MELTING OF CANDLE PHYSICAL CHANGE
- 14. CUTTING OF PAPER PHYSICAL CHANGE
- 17. AS A NOTREDAMEI ANS HOW DOES CHANGE AFFECT YOUR LIFE?
- 19. TEST I. Essay (express your idea) 1. What is the difference between physical and chemical change? (5pts. Expand your idea)
- 20. TEST II. Classify the following examples as physical or chemical changes. a) A puddle of water evaporates. b) Lighting the gas in a bunsen burner. c) Lighting a match. d) Steam condensing on a mirror. e) Melting a gold nugget to make a gold bar. f) Dynamite exploding. g) Water freezes to make ice cubes. h) Ice cream melting.